DevTools: Show not found message in FilteredListWidgets

third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @unrestricted
  */
 QuickOpen.CommandMenu = class {
   constructor() {
     this._commands = [];
     this._loadCommands();
@@ skipping 232 matching lines @@
     return false;
   }
 
   /**
    * @override
    * @return {boolean}
    */
   renderMonospace() {
     return false;
   }
+
+  /**
+   * @override
+   * @return {string}
+   */
+  notFoundText() {
+    return Common.UIString('No commands found');
+  }
 };
 
 QuickOpen.CommandMenuDelegate.MaterialPaletteColors = [
   '#F44336', '#E91E63', '#9C27B0', '#673AB7', '#3F51B5', '#03A9F4', '#00BCD4', '#009688', '#4CAF50', '#8BC34A',
   '#CDDC39', '#FFC107', '#FF9800', '#FF5722', '#795548', '#9E9E9E', '#607D8B'
 ];
 
 /**
  * @unrestricted
  */
@@ skipping 69 matching lines @@
    * @param {!UI.Context} context
    * @param {string} actionId
    * @return {boolean}
    */
   handleAction(context, actionId) {
     new QuickOpen.FilteredListWidget(new QuickOpen.CommandMenuDelegate()).showAsDialog();
     InspectorFrontendHost.bringToFront();
     return true;
   }
 };